What is the function of a cell membrane?

the function of a cell membrane is:

Explanation:

The primary function of the plasma membrane is to protect the cell from its surroundings. Composed of a phospholipid bilayer with embedded proteins, the plasma membrane is selectively permeable to ions and organic molecules and regulates the movement of substances in and out of cells.

One of the major purposes of the Schuman Plan, proposed in 1950, was to achieve lasting peace by "D. aligning European nations economically and politically". This desire was sprung from two devastating world wars, and although it ultimately failed, it eventually led to the European Union.